Knee - Oblique (Lateral)This is a featured page

Radiographic Positioning


Adult
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Name of projection Knee - Oblique - Lateral (External Rotation)
Area Covered Distal femur, proximal tibia & fibula, patella, and knee joint.
Pathology shownFractures, lesions, bony changes secondary to degenerative joint disease.
Radiographic AnatomyKnee Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Portrait
Film / Screen Combination Detail
(CR and DR as recommended by manufacturer)
Bucky / Grid No
FilterNo
Exposure 62 kVp
8 mAs
FFD / SID 100cm
Central Ray Directed to the midpoint of the knee
1.2cm distal to apex of patella
Perpendicular to IR
Collimation Collimate on the sides to skin margins
Collimate to IR borders to include maximum femur and tibia / fibula
Markers Distal and Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
RespirationNot applicable
Positioning
  • Patient in a semi-supine position on the X-ray table
  • Cushion for head
  • Entire body and leg rotated partially away from side of interest
  • Place support under elevated hip
  • Align and centre leg and knee to CR and to midline of IR
  • Rotate entire leg externally 45° (Interepicondylar line should be 45° to plane of IR)
  • If needed stabilise foot and ankle in this position with sandbags
  • CR directed to the midpoint of the knee, 1.2cm distal to apex of patella, perpendicular to IR
Critique

Positioning
Area Covered
Collimation
Exposure
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 18 2011, 2:10 PM EDT (about this update About This Update AndyC Edited by AndyC

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Keyword tags: knee oblique knee oblique positioning knee oblique technique
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